Resumen:
This study aims to examine the associations of parental rules with sedentary behavior (SB) in youth. Leisure-time SB was assessed by accelerometry and questionnaire. In boys, parental rules regarding TV were negatively associated with objectively-measured leisure-time SB and time spent in all screen behaviors, but positively associated with educational SB. Among girls, the total number of parental rules was negatively associated with the time spent surfing the Internet, but positively related with educational SB, on weekends. The imposition of rules by parents may be a simple and effective strategy to improve sedentary patterns in youth, especially among boys.